Without adding, find the sum: i) `1+3+5+7+9\ ` ii) `\ ``1+3+5+7+9+11+13+15+17+19` iii) `1+3+5+7+9+11+13+15+17+19+21+23`

Without adding, find the sum. (i) 1+3+5+7+9 (ii) 1+3+5+7+9+l1+13+15+17+19

Without doing the actual addition, find the sum of: (i) 1 + 3 + 5 + 7 + 9 + 11+ 13 + 15 + 17+ 19 + 21 + 23 (ii) 1 + 3 + 5 + 7 + 9 + ......+39 + 41 (iii) 1 + 3 + 5 + 7 + 9 + ......+51 + 53

The inter - quartile range of the data 1, 3, 5, 7, 9, 11, 13, 15, 17, 19

Find the median of : 25, 18, 13, 20, 16, 9, 22, 8, 6, 15, 21, 11, 17

The distance (in km) of 40 engineers from their residence to their place of work were found as follows: "5 3 10 20 25 11 13 7 12 31 19 10 12 17 18 11 32 17 16 2 7 9 7 8 3 5 12 15 18 3 12 14 2 9 6 15 15 7 6 12" Construct a grouped frequency dist

Find the mean deviation from the mean for the following data: Size: 1 3 5 7 9 11 13 15 Frequency: 3 3 4 14 7 4 3 4

Find the mean deviation from the mean for the following data: Size: 1 3 5 7 9 11 13 15 Frequency: 3 3 4 14 7 4 3 4

Construct a frequency table for the following ages (in years) of 30 students using equal class intervals, one of them being 9-12, where 12 is not included. 18, 12, 7, 6, 11, 15, 21, 9, 8, 13, 15, 17, 22, 19, 14, 21, 23, 8, 12, 17, 15, 6, 18, 23, 22, 16, 9, 21, 11, 16.

Find the cube of : (i) 7/9 (ii) 8/(11) (iii) (12)/7 (iv) (13)/8

Find the mode of the following data: (i) 3, 5, 7, 4, 5, 3, 5, 6, 8, 9, 5, 3, 5, 3, 6, 9, 7, 4 (ii) 3, 3, 7, 4, 5, 3, 5, 6, 8, 9, 5, 3, 5, 3, 6, 9, 7, 4 (iii) 15, 8, 26, 25, 24, 15, 18, 20, 24, 15, 19, 15